Long-wavelength optical transmission of extremely narrow slits via hybrid surface-plasmon and Fabry-Ṕrot modes

X. F. Li, Siu Fung Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)


We have verified that extraordinary transmission of long-wavelength light through extremely narrow slits in a thick metal film can be achieved by hybrid surface-plasmon and Fabry-Ṕrot modes. Transmittance of these ultranarrow slits, which have width and thickness of 0.56 μm and 100 μm, respectively, for a terahertz light with wavelength of 225 μm can be 2.1 × 108times higher than that predicted by using classic theory. Furthermore, the corresponding ratio between transmission wavelength and slit width can be up to 400, which is over 60 times larger than that the conventional grating-based surface-plasmon modes can provide.
Original languageEnglish
Article number013302
JournalJournal of Applied Physics
Issue number1
Publication statusPublished - 1 Jul 2010

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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